I upgraded to 11.1.1 and noticed that the “close” icon on popups is very small. I updated themes. I am using a custom theme, but the settings for the popup have not been customized at all.
This is true using the “Classic” theme as well. 
I am seeing the same behavior. Started showing up after we upgraded to 11.1.1 and is doing it in Production org as well as the sand box org.
I’ve been able to reproduce this. It’s only occurring with certain specified themes. Classic seems to be one of them. Thank you for bringing this to our attention
Hello Skuid Community ~
This has been addressed in the new Millau 11.1.3 release which is now available on the Skuid Releases page.
As a reminder, Salesforce does NOT allow reverting back to prior versions of managed packages. Skuid always recommends installing new versions in a non-business critical sandbox environment to test all mission critical functionality before installing into a production environment. We also recommend that you update out of date themes when you upgrade.
Please be reminded to read this version’s special release notes here.
